This may be a thing already but I can’t seem to find it. This also may not be practical in the eyes of other people so let me know if It’s absurd or not.
I think it would be really useful if you could set a limit on transactions. This could be done per transaction, for example you could ask someone to use your card to buy something but they can only spend up to ‘x’ amount because of a limit you just set on the app.
So essentially it’s a custom limit which would override the £30 contactless limit but you can set it to like £10 if you wanted.